﻿Carabideous 
  fauna 
  of 
  Mexico. 
  227 
  

  

  Smooth 
  only 
  on 
  their 
  outer 
  side, 
  on 
  the 
  inner 
  being 
  

   rather 
  strongly 
  striated. 
  The 
  thorax 
  differs 
  also 
  in 
  

   being 
  less 
  uniformly 
  rounded, 
  the 
  sides 
  behind 
  the 
  

   middle 
  being 
  slightly 
  sinuated, 
  with 
  much 
  more 
  strongly 
  

   elevated 
  margins, 
  and 
  the 
  hind 
  angles 
  more 
  acute. 
  The 
  

   elytra 
  are 
  more 
  shining, 
  and 
  their 
  sculpture 
  consists 
  of 
  

   alternate 
  narrow 
  ribs 
  and 
  wide 
  sulci, 
  interrupted 
  by 
  

   somewhat 
  regular 
  series 
  of 
  oblong 
  tubercles, 
  each 
  tubercle 
  

   separated 
  from 
  its 
  successor 
  by 
  a 
  unigranulate 
  fovea 
  ; 
  the 
  

   ribs 
  are 
  much 
  less 
  sharply 
  elevated 
  in 
  some 
  examples 
  

   than 
  in 
  others, 
  and 
  the 
  sculpture 
  becomes 
  confused 
  near 
  

   the 
  apex. 
  The 
  legs 
  are 
  slender 
  ; 
  the 
  tooth 
  of 
  the 
  men- 
  

   tum 
  is 
  narrow 
  and 
  acute, 
  the 
  penultimate 
  joint 
  of 
  the 
  

   labial 
  palpi 
  is 
  quadrisetose. 
  The 
  three 
  dilated 
  joints 
  of 
  

   the 
  anterior 
  tarsi 
  in 
  the 
  ^ 
  are 
  rather 
  slender, 
  the 
  second 
  

   not 
  being 
  much 
  broader 
  than 
  long. 
  

  

  Calosoma 
  diminutum. 
  (PL 
  XIII., 
  fig. 
  2). 
  

  

  C. 
  polito 
  (Chaud.) 
  similis 
  sed 
  multo 
  minor 
  et 
  brevior, 
  praecipue 
  

   elytris 
  breviter 
  ovatis. 
  Convesus, 
  nigei* 
  politus, 
  capite 
  thoraceque 
  

   Isevissimis, 
  hoc 
  transverse 
  lateribus 
  sequaliter 
  rotundatis, 
  disco 
  

   usque 
  props 
  angulos 
  posticos 
  convexo 
  ; 
  elytris 
  vix 
  perspicue 
  striato- 
  

   punctulatis 
  foveisque 
  conspicuis 
  triplice 
  serie. 
  

  

  Var. 
  Elytra 
  distinctly 
  punctulate-striate 
  throughout 
  ; 
  the 
  triple 
  

   rows 
  of 
  foveas 
  same 
  as 
  in 
  the 
  type. 
  Long. 
  15 
  — 
  18 
  millim., 
  ^ 
  5 
  . 
  

  

  Hab. 
  Salazar 
  (Hoge). 
  A 
  large 
  series 
  of 
  examples, 
  

   only 
  two 
  of 
  which 
  belong 
  to 
  the 
  variety. 
  

  

  The 
  mandibles 
  are 
  nearly 
  as 
  smooth 
  as 
  the 
  head 
  and 
  

   thorax. 
  The 
  thorax 
  is 
  almost 
  precisely 
  as 
  in 
  C. 
  politum, 
  

   half 
  as 
  broad 
  again 
  as 
  long, 
  destitute 
  of 
  marginal 
  groove 
  

   in 
  front, 
  and 
  without 
  trace 
  of 
  thickening 
  on 
  the 
  hind 
  

   margin, 
  the 
  lateral 
  border 
  moderately 
  thickened 
  and 
  

   reflexed, 
  the 
  surface 
  smooth 
  and 
  without 
  depression 
  

   near 
  the 
  hind 
  angles, 
  which 
  are 
  broadly 
  rounded. 
  The 
  

   elytra 
  are 
  strongly 
  convex, 
  and 
  in 
  nearly 
  all 
  the 
  numerous 
  

   examples 
  have 
  no 
  conspicuous 
  sculpture, 
  except 
  the 
  

   three 
  rows 
  of 
  fovese, 
  which 
  in 
  most 
  specimens 
  are 
  strongly 
  

   impressed, 
  and 
  one 
  row 
  of 
  small 
  intra-marginal 
  points 
  ; 
  

   but 
  minutely 
  punctured 
  striae 
  are 
  visible 
  under 
  the 
  lens. 
  

   The 
  under 
  side 
  is 
  smooth, 
  except 
  two 
  or 
  three 
  punctures 
  

   on 
  the 
  sides 
  of 
  the 
  ventral 
  segments. 
  The 
  prosternal 
  

   process 
  is 
  broader 
  and 
  less 
  narrowed 
  behind 
  than 
  in 
  

  

  TRANS. 
  ENT, 
  SOC. 
  LOND. 
  1891. 
  — 
  PART 
  II. 
  (jUNE.) 
  R 
  

  

  